Improvement in dies for forging axles



JOHN HARRINGTON.

P Q BI'Itin D'ies for Forging A-x'les. I N0. 115,196.; Patented May23,1871.

= UNITED STATEs PATENT OFFICE. j

JOHN HARRINGTON, or BRIDCRPORT, CONNECTICUT.

. IMPROVEMENT IN DIES FOR FORGING AXL'ES.

Specification forming part of Letters Patent No. 115,196, dated May 23,1871.

To all whomit may concern:

Be it known that I, JOHN HARRINGTON, of

] Bridgeport, in the county of Fairtield and State of Connecticut, haveinvented anew Improvement in Dies for Forging Axles; and I do herebydeclare the following, when taken in connection with the accompanyingdrawing and the letters of reference marked thereon,

to be afull, clear, and exact description of the same, and which saiddrawing constitutes part of this specification, and represents, iii-Figure 1, a face view of the lower die; Fig. 2, a face view of the upperdie; Fig. 3, a side view of the axle as it comes from the dies;

and in Figs. 4 and 5, respectively, end views of the lower and upper(lies.

This invention relates to an improvement in dies for forging axles, andespecially that class called coach-axles, as shown in Fig. 3, formedwith a collar, a, a cylindrical portion, (1 0, each sideof the collar,and an arm, f, the part It back of the cylindrical portion d formedsquare. The object of this invention is the construc tion of dieswhereby the axle may be thus formed at a single heat; and it consists inthe construction of dies for this purpose, as more fully hereafterdescribed. 1

The ends A A of both the lower and upper die are formed as seen in Figs.4 and 5, leaving narrow meeting-surfaces on both sides, as seen in Figs.1 and 2. Next adjoining this portion of the die is formed the die forshaping the collar'and the square portion for the axle 'i, being arecess corresponding to the collar a. n is a second recess,corresponding to the cylindrical portion ol, and a recess, m, of Vshape, corresponds to the square portion h. Each way, 0 D, from theseparts the die is formed to simply contract the metal. Then the finishing-die is constructed with a recess, B,

to form the arm, and recesses i, a, and s to form, respectively, thecollar a and the cylindrical portion at c.

The bar from which the axle is to be formed is heated and placed in therecess 0 D of the lower die, and the upper die caused to strikesuccessive blows upon the blank, the Operator turning the bar, betweeneach stroke, onefourth around, until the collar a, cylindrical portion01, and square portion h are shaped. Then the blank is taken from thedie and that part of the bar which extended into the recess 0 of the dieis placed on the anvil A, and then, by the action of the upper die, isdrawn out until in suitable position to be placed in the finishing-die.Itis then placed in the finishing-die, the square portion outside, andthe blank constantly turned while the upper die is operating until thearm f, collar a, and cylindrical portion 11 e are all finished to therequired size, and this operation I am enabled to perform by these diesat a single heat.

To save a multiplicity of dies I make the blocks E F, within which theshaping-dies are formed, detachable from the anvilAgso that other diesfor diiferent-sized axles may be substituted.

I do not broadly claim dies for shaping axles, and I do not wish to beunderstood as broadly claiming the dies B S i n and D m M0 ant thebreaking-down die A.

I claim as my invention-- The dies B S i n and D m at c jointly with thebreaking-down die A connected therewith, substantially as described.

' JOHN HARRINGTON.

Witnesses L. M. SLADE, U. M. HATCH.

